We Are Ophthalmology LTD We Care About Your Health

Over the years, Ophthalmology LTD's name has become associated with the highest quality of comprehensive medical and surgical eye care. Highly trained ophthalmologists David West, Bryan Hammer, Eric Thomas, Dustin Dierks, Ryan Geraets, Michael Eide, Elizabeth Atchison, Elise In’t Veld, and Karen Dickes, as well as experienced optometrists Andrea McCann, Emily Walters, and Tyler Vermeer combine their considerable expertise to give each and every patient the best possible care. Ophthalmology LTD delivers treatment for cataracts, glaucoma, diabetic eye disease, as well as cornea transplants, oculoplastic surgery, retina surgery, vitreoretinal surgery, and pediatric eye care in Sioux Falls.

The Finest Eye Specialists in the Tri-State Area

Ophthalmology LTD brings the finest eye specialists in South Dakota to satellite offices in the tri-state area: Luverne, Pipestone, Worthington and Windom in Minnesota, Rock Valley, Sibley, and Sioux Center in Iowa, as well as Dell Rapids, Madison, Mitchell, and Yankton in South Dakota.


In 1968, Ophthalmology LTD revolutionized eye care by taking a comprehensive approach, bringing patients a full range of vision specialties under one roof. Today, eye care teams across the nation are now mimicking the strategy we have spent more than 50 years perfecting. It is because of this experience and our genuine dedication to our patients that our team is widely considered the finest, most comprehensive group of sub-specialty eye surgeons in the tri-state Siouxland area.

Our Services

Our ophthalmologists have expertise in a wide range of specialties and work as a team to meet your eye care needs.


Not only is cataract treatment the most frequently performed surgery in the United States, it is also one of the most successful. More than 99% of patients who undergo cataract removal rank their vision as significantly improved. Drs. Osmundson, Hammer, Dierks, Eide, In't Veld, and West perform this highly effective procedure.

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Early detection and treatment is the key to preventing vision loss with Glaucoma. More than three million Americans have glaucoma, but only half are actually aware that this "silent thief" is slowly and without warning stealing away their vision, sometimes without any noticeable symptoms. Drs. Osmundson and In't Veld  at Ophthalmology LTD specializes in the diagnosis and treatment of glaucoma.

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Children should have a yearly comprehensive eye exam along with their parents. Many vision problems can be detected early and treated before they become detrimental to a child's development, learning abilities, and every day function. Dr. West of Ophthalmology LTD has 22 years of experience in the evaluation and treatment of children's vision.

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The retina functions much like the film in a camera, and when film is damaged, so is the picture. Our retinal specialists Drs. Geraets, Thomas, and Atchison  offer comprehensive retinal exams and treatment to protect against diseases such as diabetic retinopathy that can damage your retina and vision.

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If a window pane is distorted or marred by imperfections, it is difficult to see out through it clearly. Your cornea is your eye’s window. To keep it clear or to restore it to its proper state, Dr. Eide of Ophthalmology LTD uses his specialty training in corneal diseases to treat dry eye, keratoconus, and other conditions that can cause corneal imperfections.

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When your eyelids, eye sockets, or tear ducts malfunction, or a tumor threatens your vision, Ophthalmology LTD oculoplastic surgeon Dr. Hammer can help. Specializing in procedures that restore clear vision as well as a more youthful appearance, Dr. Hammer treats and manages a wide variety of ocular conditions.

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We are a team of passionate professionals with
caring for patients in South Dakota, Minnesota, & Iowa.

Have a look around, then call, request an appointment online, or come by to learn more about how our team of eye experts can help you and your family.

  • Jeff W.

    Everyone was friendly, courteous and professional. I liked Dr. Hammer. He explained in detail everything about my issue and the procedure to correct it. He also took the time the get to know me on a personal... read more

  • Peggy H.

    Each representative was knowledgeable, polite, and explained everything throughly

  • Kandy S.

    Friendly staff and great doctors.

  • Jane J.

    All of the doctors, nurses, and associates are wonderfully helpful. We trust them and appreciate their friendly professionalism.

  • Donna F.

    They treated me great! I was nervous at first but when I was done with my appointment I was informed what was wrong and I understood what I needed to do.

  • Larry A.

    Very impressed with the thorough exam process…not rushed like so other offices, And a summary discussion too.

  • Elaine B.

    This was a very good experience. Everyone at Opthomology Limited is so kind. They take such good care of their patients. It was good meeting Dr Karen Dickes. She was very friendly & explained everything she was talking... read more

  • Kim C.

    I was impressed with the organization and patient flow at Opthalmology LTD. I never waited more than 5 minutes to be called for the next event in my visit. Every person I talked with was cheerful and genuinely interested in... read more

  • Marissa I.

    Dr. Eide was very respectful and thorough will my evaluation. Very kind and talked me through everything with a smile. 10/10 recommend him!

  • Larry G.

    Dr. Eide is wonderfully courteous, caring, took time to thoroughly answer all my questions and concerns. He puts you at ease right away and made the appointment a very pleasant experience.

  • Scott A.

    It was pleasant and professional

  • Dennis W.

    the people are fantastic and very knowledgable.

  • Pam D.

    Great care . Professional. Very satisfied. Would definitely recommend.

  • Carol J.


  • jon s.

    Always enjoy seeing the doc but I don’t enjoy the shot in the eyeball.

  • Barb L.

    Everyone was very friendly and professional. They explained all tests and procedures in understandable terms.

  • douglas p.

    Referral to Dr Eidde. Very professional always checking to see my needs are met. All procedures are explained and he makes sure I understand exactly what to expect.

  • sturdyinsd

    My appointment was with Dr Eric Thomas. He was professional, through and caring. He explained my situation to us and what testing I could be expecting at this time. He explained depending upon the test results, what my options... read more

  • Kim O.

    Had an issue that needed attention immediately. They got me in within a few hours. The doctor who saw me needed the opinion of a retina specialist after examining my eye. They scheduled me in right then and there so... read more

  • Larry M.

    polite professional staff

  • Don N.

    Very thorough and informative.

  • Justin T.

    Everyone there is extremely friendly and helpful. You definitely feel comfortable with the knowledge and experience of Everyone helping you.

  • Phil L.

    Dr Atchison and the staff at Ophthalmology LTD have always been professional and helpful everytime I have had treatments for the last couple of years. They have been accommodating working with my schedule and are always willing to answer any... read more

  • Kimmy M.

    My experience at Ophthalmology LTD with Dr. Walters was awesome! She was very thorough in both her assessment and follow up questions. She knows I often dread the testing and/or results and took the time to reassure me and give... read more

  • Dawn S.

    This clinic got me in quickly, and were very professional. Highly recomed them!

  • Bill V.

    Everything, the nurses are awesome and doctor Atchison is very considerate of her patients

  • Ron R.

    Have had a couple of visits there the past month. Both doctors were verify professional, nurse were exceptional, gathering information and testing.

  • Nancy L.

    I had a second thorough, professional, and enjoyable appointment with Dr Emily Walters at Opthalmolgy, LTD in Sioux Falls. I saw her in 2019, my eyes have changed in that time, and she took all the time I needed to... read more

  • simon n.

    A very good doctor and takes time to advice on options a patient can chose.

  • Raj S.

    very well coordinated between staffs

  • Larry L.

    With all the doctors I see because of my chronic illnesses, through the Avera Medical System, Dr. McCann is definitely one of the best. Her caring nature, personable approach, and willingness to listen and work with me and my... read more

  • Denise M.

    They have the most caring staff. Dr. Hammer is a very nice person. He is very knowledgeable and tells you like it is. My surgery went well and I am still healing.

  • Louise H.

    continuing sucessful maintenance of wet macular degeneration, glaucoma, surgery, friendly, competent staff.

  • Byron P.

    Very professional and personal staff and physicians. I have had surgery on two separate occasions and numerous clinic appointments at Ophthalmology Ltd and have the utmost confidence in their skills. This is the best clinic for eye care!

  • Carlton H.

    Great checkup process! Stepped thru process very quickly and promptly! Every person skilled in their area of expertise! Excellent experience!!!

  • Randee B.

    Great staff-super nice Dr. Geraets!

  • Sheryl M.

    Everyone was very friendly knowledgeable and I would go to them to have any other one I work done that I needed to do

  • Rick S.

    Everyone at Opthalmology LTD is top notch. Always greeted with a smile and very short wait times. Dr Hammer is the best, always acts like he is happy to see me and calls me by my name.

  • Jane B.

    I was greeted promptly at the desk, did not have to wait very long to be seen and got “interviewed “ by the Dr.’s assistant quickly. My time with Dr. McCann was pleasant and informative.

  • Dee N.

    friendly, professional, punctual, and most of all they know what they are doing.

  • Don O.

    the professionalism I observed from everyone was unsurpassed. I would recommend opthamology to everyone needing their services

  • Karla A.

    I had a great experience here. It’s a very busy atmosphere but efficient. I was referred by my dermatologist so it was my first visit. They were able to preform a minor procedure for me. Dr Hammer and his staff... read more

  • Darla H.

    Got me in to see a doctor right away for an emergency. I really needed that.

  • Roxie E.

    My concerns were handled quickly and information given to me immediately. Dr McCann was efficient, warm and concerned with my care, as were her office personnel. I am looking forward to my next appointment with her!

  • Michael P.

    Ophthalmology LTD has been my “go-to” place for all my eye care.Excellent doctors and professional staff that really care about me tend to my wishes.They are always willing to address any issues I have with my eyes or with appointments.I... read more

  • Dennis D.

    very friendly and professional help.
    Always prompt. Very short wait times alway.
    They're great!

  • Deb '.

    Dr. Hammer was great… Took care of my issue very quickly and efficiently!

  • Ez R.

    All the staff is awesome they are efficient and Dr. Garrets is excellent ! He has a great personality and I suggest if you need help he is the man to ease your stress and help you over treatments you... read more

  • Roger N.

    Dr Hammer was truly amazing. Very knowledgeable and friendly. Thank you!

  • Ted P.

    Very professional! Very thorough!